1. 增补;补充
    If you supplement something, you add something to it in order to improve it.

    e.g. ...people doing extra jobs outside their regular jobs to supplement their incomes...
           除了正常的工作外还要额外兼职以贴补收入的人
    e.g. I suggest supplementing your diet with vitamins E and A.
           我建议你在日常饮食中补充些维生素 E 和维生素 A。

2. 营养片剂;补品
    A supplement is a pill that you take or a special kind of food that you eat in order to improve your health.

    e.g. ...a multiple vitamin and mineral supplement...
           含复合维生素和矿物质的营养剂
    e.g. I took regular supplements and exercised every day.
           我每天都按时吃营养片并坚持锻炼。

3. (杂志或报纸的)增刊，副刊
    A supplement is a separate part of a magazine or newspaper, often dealing with a particular topic.

    e.g. ...a special supplement to a monthly financial magazine.
           一本金融杂志月刊的特别增刊

4. (书籍的)补编，补遗，附录
    A supplement to a book is an additional section, written some time after the main text and published either at the end of the book or separately.

    e.g. ...the supplement to the Encyclopedia Britannica.
           《不列颠百科全书》附录

5. 额外费用;附加费
    A supplement is an extra amount of money that you pay in order to obtain special facilities or services, for example when you are travelling or staying at a hotel.

    e.g. If you are travelling alone, the single room supplement is £11 a night.
           如果是一个人旅行，住单间每晚要多交 11 英镑。

6. 补助;补贴
    A supplement is an extra amount of money that is paid to someone, in addition to their normal pension or income.

    e.g. Some people may be entitled to a housing benefit supplement.
           有些人可能有资格拿到住房补贴。
    e.g. ...people who need a supplement to their basic pension.
           除了基本养老金外还需要额外补贴的人